Refillable fuse



REFILLABLE FUSE.

APPLICATION FILED SEPT. 12. 1919,

1 ,{104,1 14, Patented Jan. 17, 1922.

INVENTOR 9 w "3 b Ms attorn y,

UNITED STATES PATENT OFFICE.

REFILLABLE FUSE.

Application filed September 12, 1919.

To all whom it may concern Be it known that I, Gnonor. L. Gons, acitizen of the United States, residing at Buffalo, in the countyof Erieand State of New York, have invented certain new and useful Improvementsin Refillable Fuses; and I do hereby declare the following to be a.full, clear, and exact description of the same, such as will l enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, and to figuresof reference -marked thereon, which form part of this specification.

Like figures of reference refer to like parts.

This inventionrelates to enclosed refillable fuses.

One of the objects of this invention is to provide a refillable fusehaving interlocked detachable ends with considerable surface contactbetween each terminal part and the ends of the fuse piece, so that thesame can be readily taken apart either for examination or renewal of thefuse strip.

Another object is to provide a refillable fuse which is cheaply butstrongly and durably made and one that can be easily and quickly takenapart and put together.

A further object is to provide a refillable fuse of such construction aswill lend itself to the ordinary processes of production andmanufacture.

Another object is to provide. a refillable fuse having simple andeffective means to prevent fire from getting outside of the fuse casing.

A further object is to provide a simple and effective means of enclosingthe refillable fuse.

Other objects of this invention will appear from a consideration of thespecification and the drawings, which form a part thereof, in which twoembodiments are illustrated.

In the drawings,

Figure 1 is a longitudinal section of a complete refillable fuseembodying my invention.

Figure-2 is an end View of the refillable fuse shown in Figure 1.

Figure 3 is a perspective view of the principal internal member of thefuse shown in Figure 1.

Figure 4 is a perspective-view showing one Specification of LettersPatent.

'16, the inner edges of which Patented Jan. 17, 1922. Serial No.323,377.

of the terminal this fuse.

ferruled contacting ends of perspective view of one end of an assembledrefillable fuse, such as shown in Figure 1.

Figure 6 is a plan view of a fusible connection between the terminals ofthe fuse, showing a contracted section in the center.

F igure 7 is a sectional elevation of a modified form of a refillablefuse showing another embodiment of my invention, differing from thatshown in the other figures, in the construction of its ferruled ends.

Figure 8 is an end view of the fuse shown in Figure 7.

Figure 9 is a erspective view of one blade terminal end of the fuseshown in Figure 7.

Figure 10 is a perspective view of one of the ferruled ends of the fuseshown in igure 7, adapted to receive the terminal end shown in Figure 9.

In Figures 1, 2, 3, 4, 5 and 6, the form of fuse shown has a tubularcasing 1, in the ends of which are the terminal pieces 2, of

.like construction, connecting which is the fuse piece 3, which is shownin Figure 6, having screw holes 3*, 3", and a central contracted portion3* for fixing the position of the blowing point of the fuse. In threadedengagement with the terminal pieces 2, are screws 4, Whichalso pass intothe body of the tubular casing 1 at the points 4, to lock the terminalpieces 2, longitudinally and rotatively within the casing 1. The tubularcasing 1 has a longitudinal slot 5, for the passage of the fuse piece 3and the fireproof strip 6, both of which are held on beneath the washer7 by the screws 4, binding the same to the terminal pieces 2. The strip6, is longer than the piece 3, and between the terminal pieces 2, itisbent upward to be spaced from the strip 3, which space, includingthatbelow the strip 3, is filled with a fire proof powdered material 8.

Fitting around the casing 1 is a tubular envelope having two parts 9 and10, conically fitted together at 11. Fixed to each of the outer ends ofthe tubular envelope parts 9 and 10, are ferrules 12, each having acovered end 13 comprising a central cross strip 14 and two depressedsegments'15 and are spaced from the cross strip 14, while the plane ofthe segments 15 and 16 is parallel with the plane of the cross strip 14.The cross strip 14 has an extension 17, which isintegral with thesegment 15, through-the shoulder 18. The

cross strip 14 has another extension 19,111

tegral with the segment 16, through the:

shoulder Abutting the underside of the cross strip 14 is the center ofthe blade 21,

the underside of the outer ends of which are, in surface-contact withthe seginents'15 and 16." The blade 21 isiintegral withthe "body of theterminal 2,through the neck 22,

thereby spacing the blade 21, from the body of the terminal 2.

In the modified form of fuse shown in the 4 remaining figures, thetubular casing 1 is shown to be envelopedby the tubular parts '9 and 10having a conical joint at 11. Eachof the tubular venvelope parts has aferruled end 12, fixed thereto. Each ferruled'part 12 has a circular lip12", integral withthe body of the ferrule 12, and each circular lip hasan outstanding shouldered end 12. In bearing contact with the lips ofthe lips 12", and'brought against the 12 are the segmental flanges 23 ofthe terminal pieces 2 These flanges 23 are adapted to pass through thespaces 12 between the lips 12*, tobe removably positioned on top firstsixfiguresfis. done as follows: Each terminal end 2, is fitted into theopen ends of the tubularicasing 1, and is rotated to have the threadedhole register with the holes 4*, in the casing 1, which holes may bethreadedor not, as desired. A portion of the powdered fireproof material8 is next placed in the lower half'of the tubular casing 1, between theterminals 2, and the fusible strip 3 placed thereon through the slot 5,so

that, its holes 3 egister with the threaded 'screw holes in theterminals 2. More fireproof powder is nextadded to cover" the strip 3,and the fireproof'strip 6 is next put in place and the screws 4 with thewashers 7, are positioned so'that in the turning of the screws 4, withinthe threaded holes of the terminal 2, all parts are bound together, andthe screws 4, pass beyond the terminals 2, and enter the holes 4?. I

Next each envelope part 9 and 10 with it's ferruled end 12,'is slippedover the tubular casing 1, so that each blade 21, of the terminals 2,enters theslot between the segments 15 111161 16, and the'ferruled endsare pushed toward one another until each blade 21 comes in contact withthe strip 14,.when the ferruled ends are turned in opposite directionsso that each blade 21, by its quarter turn,--comes in contact with theshoulder 18 and 20 in lockedposition. The parts 9 and 10 of the envelopeare then engaged in con tact at 11, and the fuse is complete and readyto be'inserted in the usual terminal clips, which engagethe ferruledends 12. To remove the'ferrule'd ends 12 with the attached. envelopeparts 9 and 10, the same are rotated through a quarter turn intheioppositedirection to which they were rotated to engage the shoulders'18 and 20, until each blade 21 registers again with the slot betweenthe segments 15-and 16, when the ferruled ends 12, are in position to bewithdrawn, and

by the removal of the screws 4, the stripf6 may be removed for replacingthe fragmentary ends of the blown strip 3,-with a new strip. f. V

In the construction shown in: Figures 7:, S, 9 and 10, the manner ofassembling the parts is similarto that shown in the other fi ures butinstead of a blade 21 wvehave v flanges 23, which pass through spaces12?, so that the flanges 23 contact the upper sides toward one another,thus holding these parts together and maintaining a forced contactbetween the flanges 23,-and the lips 12% If desired either the ferrules12 01 the fiat member, having flanges 23,.may be made of insulatingmaterial to insure the insula- 1 of the lips 12", forcing the ferruledends 12 tion of the ferrules from the terminal ends v i 2? carrying theblades 24 through which the current passes,

V Other-modifications of my invention may be devisedwithout departingfrom the spirit wish to be confinedto the two embodiments herein shownand described, hence I claim,

1. A refillable fuse, comprising a tubular member of insulatingmaterial, a terminal piece entering each end of said member, a

and scope of the same, I therefore donot 2. A refillable fuse, comprsing'a tubular member of insulating material, said tubular member havinga longitudinal slot midway of its ends, a terminal piece entering eachendof said member and extending, within, 7

beyondthe ends of said slot, a fusible strip releasably connecting. saidterminal pieces within said member and adapted to pass said slot, alocking element oneach-terminal piece, a two-part envelope encasing saidmember, metallic means capping one end of each of the parts of theenvelope, and a complemental locking element integral with each of saidmetallic means adapted to engage the aforesaid locking element.

3. A refillable fuse, comprising a tubular member of insulatingmaterial, a terminal piece entering each end of said member, a fusiblestrip releasably connecting said terminal pieces within said member, alocking element on the outside of each terminal piece including a tongueextendin transversely of the length of said mem er and spaced from thebody of said terminal piece, a two-part envelope encasing said member, ametallic ferrule capping one end of each of said parts of the envelope,each ferrule having parallel portions forming the end thereof and spacedfrom one another to include said tongue in surface contact therebetween.

4. In a refillable fuse, including a supporting member, terminal ends,and a replaceable fuse strip, the combination with each of said terminalends, of a locking part thereon, cap pieces fitting over said ends andcompletely enveloping said member, and a complemental locking part oneach cap piece adapted and positioned to co-act with the locking part ofthe terminal end adjoining it.

5. A refillable fuse, comprising a long hollow member having alongitudinal opening on one side thereof, terminals entering each end ofsaid member and extending within, beyond the ends of said opening, ascrew having threaded engagement with each terminal transversely to saidmember,passing into said member, a fusible strip connected by saidscrews to said terminals, within the hollow of said member, a fireproofstrip connected by said screws covering said fusible strip, outsideterminal pieces releasably locked to said terminals, and a protectedcovering surrounding said member between said outside terminal pieces.

6. In a refillable fuse the combination with a tubular casing havingterminal pieces, of a fusible strip connecting said pieces and partiallyenclosed by said casing, and a fireproof strip above and furtherenclosing said fusible strip.

7. In a refillable fuse the combination with a tubular casing havingterminal pieces, of a fusible strip, a fireproof strip and meansfastening said strips to said pieces and positioning said pieces in saidcasmg.

8. In a refillable fuse the combination with a tubular casing having alongitudinal slot intermediate its ends, of terminal pieces in saidcasing, a fusible strip fixed to said pieces and a fireproof stripbetween said fusible strip and the slot in said casing.

9. In a refillable fuse the combination with a tubular casing having alongitudinal slot intermediate its ends and a fuse supported by saidcasing, of a two part envelope removably secured to the ends of saidcasing and covering the slot therein.

GEORGE L. GORS.

